The content originally appeared on: CNN Abuja, Nigeria (CNN)More than 30 people were killed and others injured when a stampede broke out at a church event in the southeastern Nigerian city of Port Harcourt on Saturday, according to police and security officials. Most of the casualties were children. The incident took place at a local polo club, where the nearby Kings Assembly Church had organized a gift donation drive, according to Olufemi Ayodele, a regional spokesman for Nigeria's Civil Defense […]